No. The assumption was that you currently had 1x1Gb and you wanted to add 1x2Gb for 3Gb total. In this case it would make sense to remove the 1x1Gb and replace it with 1x2Gb. If you already have 2x1Gb there is no reason to replace 1 of those with 1x2Gb as this will not work.

No. The assumption was that you currently had 1x1Gb and you wanted to add 1x2Gb for 3Gb total. In this case it would make sense to remove the 1x1Gb and replace it with 1x2Gb. If you already have 2x1Gb there is no reason to replace 1 of those with 1x2Gb as this will not work.

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sorry for confusion in my mac i have 2x1gb and wanted to know if i replaced one of the 1gb for a 2gb giving me 3gb would that have worked

That question cannot be answered until you tell us whether your machine is a CoreDuo or a Core2Duo. See post #2 or the guide that was linked.

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ok its a CoreDuo, like i said all i was doing was wondering why they had a limit of ram you could install and what would happen if you went over that even by a gb 1x1 plus 1x2 or if it had just a single 2gb could a 1gb be added just the same really

ok its a CoreDuo, like i said all i was doing was wondering why they had a limit of ram you could install and what would happen if you went over that even by a gb 1x1 plus 1x2 or if it had just a single 2gb could a 1gb be added just the same really

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I've read where some have tried and cannot boot. 1 x 1 is all you're going to get. Better to have matche pairs too.

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